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Table 1 ICD-10 Endocarditis codes and corresponding ICD-9 codes (and clinical modifications)

From: ‘Caveat emptor’: the cautionary tale of endocarditis and the potential pitfalls of clinical coding data—an electronic health records study

ICD-10 Code Description Corresponding ICD-9 Code/ICD-9-CM code Description
Included
 I33 (I330) Acute and subacute infective endocarditis 4210 Acute and subacute infective endocarditis
 I38 Endocarditis, valve unspecified 4249 Endocarditis valve unspecified cause
 (I38.X) 42499 Other endocarditis valve unspecified
 I339 Acute and subacute endocarditis, unspecified 4219 Acute endocarditis unspecified
 T826 Infection and inflammatory reaction due to cardiac valve prosthesis 99661 Infection and inflammatory reaction due to cardiac device implant and graft
 B376 Candidal endocarditis 11281 Candidal endocarditis
 I39 Endocarditis and heart valve disorders in diseases classified elsewhere 11504 Histoplasma capsulatum endocarditis
 (I390)   Histoplasma duboisii endocarditis
11514 Histoplasmosis endocarditis
11594 Acute and subacute infective endocarditis in diseases classified elsewhere
4211 Endocarditis in diseases classified elsewhere
 I398 Endocarditis, valve unspecified, in diseases classified elsewhere 42491  
Not included
 I423 Endomyocardial (eosinophilic) disease 4250 Endomyocardial fibrosis
 I091 Rheumatic diseases of the endocardium, valve unspecified 3979 Rheumatic diseases of the endocardium valve unspecified
 T827* Infection and inflammatory reaction due to other cardiac and vascular device, implants and grafts 99661 Infection and inflammatory reaction due to cardiac device implant and graft
99662 Infection and inflammatory reaction due to vascular device implant and graft
 I011 Acute rheumatic endocarditis 3911 Acute rheumatic endocarditis
Codes that feature only US specialised coding guidance (ICD-10-CM 2010) [27], not in UK datasets
 A3951 Meningococcal endocarditis 3642 Meningococcal endocarditis
 A3282 Listerial endocarditis 42491 Endocarditis in diseases classified elsewhere
 A5203 Syphilitic endocarditis 42491 Endocarditis in diseases classified elsewhere
 B3321 Viral endocarditis 7422 Coxsackie endocarditis
 A5483 Gonococcal heart infection 9884 Gonococcal endocarditis
  1. *The T827 code (‘Infection and inflammatory reaction due to other cardiac and vascular device, implants and grafts’) was not selected as a review of the Oxford 2016 audit data suggested it was overwhelmingly used for wound infections after surgery, and the number of admissions with a primary or secondary T827 code was greater than all other endocarditis-coded admissions combined